They took refuge in a bomb shelter.
Housed in a former bomb shelter and painted black, it's packed with the hoodie-and-skullcap set.
Uh, you know, we're going to the birthday party. It's not a bomb shelter .
The city's bomb shelters were being prepared for possible air raids.
Every time the air raid siren sounded, people rushed to the nearest air raid bomb shelter.
The secret world of the old Shanghai bomb shelter seems to exist in a parallel universe.